As I have said before, 1000-1200 calories is not enough. Now that you are eating more, likely closer to a normal amount, your body may be trying to hold onto whatever it can to prepare for the next "famine" that you put it through. This will only slow your metabolism over time and cause more frustration.

I encourage you to do some research yourself and see what amount of calories your body should be getting, and follow that amount. Fasting works for some people but it does not work for you, as you have seen. It is not supposed to be a way of punishing oneself for eating too much. Exercise is always a beneficial habit to get into as well.